Pronunciation: (chānj'ling),[key] —n. 1. a child surreptitiously or unintentionally substituted for another.
2. (in folklore) an ugly, stupid, or strange child left by fairies in place of a pretty, charming child.
3. Philately.a postage stamp that, by accident or intention, has been chemically changed in color.
4. Archaic. a. a renegade or turncoat.
b. an imbecile.